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Analysis of Creep Curves of Haynes 230 Superalloy (Articolo in rivista)

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Analysis of Creep Curves of Haynes 230 Superalloy (Articolo in rivista) (literal)

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MALDINI M., ANGELLA G., LUPINC V. (2010)
Analysis of Creep Curves of Haynes 230 Superalloy
in Materials science forum
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The creep behaviour of the solid solution strengthened nickel-based superalloy Haynes 230 has been investigated under constant load and temperature conditions on as received, after conventional solution treatment, and on overaged conditions. The experimental results have shown a very strong dependence of the creep curve shape with the applied stress/temperature: in the tests performed at high stresses/low temperatures, the primary/decelerating stage takes an important portion of the creep curve. At these test conditions, the accelerating creep is mainly caused by the increase of the applied stress with the strain as it happens in constant load creep tests. In the tests performed at low stresses/high temperatures, the primary stage is very small and the following accelerating creep is characterized by different accelerating creep stages. The analysis of the creep curves on the as received and overaged alloys, has shown that a large portion of the accelerating creep at low stresses/high temperatures is caused by microstructural instability. (literal)

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